Question: The coercive force is defined to be the applied magnetic field needed to bring B?back to zero along the hysteresis curve (point c?in Figure). For

The coercive force is defined to be the applied magnetic field needed to bring B?back to zero along the hysteresis curve (point c?in Figure). For a certain permanent bar magnet, the coercive force B_app = 5.53 ? 10^?2 T. The bar magnet is to be demagnetized by placing it inside a 15-cm-long solenoid with 600 turns. What minimum current is needed in the solenoid to demagnetize the magnet?

P, Br Buye dde. P2

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